Trying to go for a Octavia VRS TDI (06/66 plate preferable) with front parking sensors

So, after a very lucky few months at work and the part exchange value of my current car as high as it probably will ever get, I potentially got the money to put a deposit on an Octavia VRS.
Looking for a TDI in the £30 VED bracket (So basically 16 or 66 reg plate from what I understand) to keep the running costs as low as I can due to the miles I clock up on the motorway to work, while still having the potential for a bit of fun.
I noticed currently, possibly due to the used car market being in a bit of a bad state due to the new car shortages, that these are a bit lacking, especially ones with front parking sensors which are rare as hens teeth.
With that in mind, how difficult and expensive would it be to retrofit front sensors that integrate into the infotainment system?
I appreciate this might be better asked in the owners sections of the forums but as I don't have an example as of yet.
Would it be better to keep waiting until one with factory fitted front sensors shows up or just get an aftermarket/OEM solution fitted to a basic VRS instead?
Would going for a more expensive example with a 17/67/18/68 plate make the process easier?
Should I just give up on getting and just be very careful with my parallel parking? 😅

It seems to be slightly easier to get petrol driven examples with the front sensors option fitted. How much worse is the fuel consumption on mostly motorway commutes if I decide to go with one of those instead?
Are they any other showstoppers I need to be aware of before putting my money down at the forecourt?

Thank you all in advance.